From: Stefano Crocco <stefano.crocco@...>
Date: 2008-10-11T01:11:09+09:00
Subject: Re: Running Multiple Versions of Ruby on Debian?

Alle Friday 10 October 2008, John Griffiths ha scritto:
> Well so far things are going kind of good, I've built my own server and
> it's sitting in colo running Debian Etch and Ruby 1.8.6 (built from
> source)
>
> Now me being me I wouldn't mind running 1.8.7 alongside 1.8.6 for my
> Rails blogging software.
>
> Has anyone had any experiences in running multiple versions of Ruby on
> Debian Etch?
>
> I found one article which explains how to run 3 using
> update-alternatives but pretty unsure if it'll adapt well to Debian,
>
> http://blog.michaelgreenly.com/2008/08/multiple-versions-of-ruby-on-ubuntu-
>2.html
>
> Seems possible, especially using:
>
>   ./configure --prefix=/opt/ruby-1.8.7-p71
>
> To set where to install the Ruby version, I'm imagining I'd have to run
> gem --update like,
>
> /opt/ruby-1.8.7-p71/bin/gem --update
> or
> /opt/ruby-1.8.7-p71/bin/gem install rails
>
> to install the necessary gems per ruby install without touching the one
> in /usr/bin/ruby,
>
> then i'm imagining,
>
> /opt/ruby-1.8.7-p71/bin/thin start -C /var/www/apps/myapp/thin.conf
> ...to start the thin webserver with my config file
>
> Will try out on a virtual machine first, but am i on the right track or
> is there something better?

I'd also suggest to pass configure the --program-prefix or --program-suffix 
arguments. This way, you can call the ruby 1.8.7 executable ruby187, instead 
of just ruby and you won't have to use its full path every time you want to 
use it. The same happens with the other executables, like irb and ri.

Stefano